Wärtsilä Adds New 62-, 72-Bore Low-Speed Engines
Wärtsilä has added new 62- and 72-bore low-speed engines to its portfolio. These standardized engines offer high propulsion efficiency, reliability, and optimized total cost of ownership for customers in the bulker, tanker and feeder container markets, the company said.
Both engines employ Wärtsilä’s low-speed technology, and incorporate electronically controlled fuel supply and control. The 62-bore engine, with a bore of 620 mm, has four to eight cylinders, each with an output of 2660 kW at a speed of 97 to 103 r/min. The 72-bore engine has a bore of 720 mm and four to eight cylinders, each with an output of 3610 kW at a speed of 84 to 89 r/min.
The stroke/bore ratio in the new engines offers internal efficiency with a gain of 1 to 2% compared with current engines and, depending on the vessel type, the lower engine speeds make it possible to improve propulsion efficiency by 2 to 6%, according to Wärtsilä. The new engine designs also offer de-rating possibilities, with overall efficiency gains of 5 to 8% at vessel level as a possibility.
The primary targets for the 62-bore engine are smaller capesize bulk carriers, Panamax bulk carriers, Aframax tankers and handysize container vessels, while capesize bulk carriers, Suezmax tankers and Sub-Panamax to Panamax container vessels are suitable applications for the 72-bore engines. The first 62-bore engine will be available for delivery in September 2013 and the first 72-bore engine will be available about one year later. The new engines are designed to serve the merchant fleet in vessels that use smaller engines.
For more information: www.wartsila.com